1. Open a new email message.

  2. Select Signature > Signatures from the Message menu.

    Depending on the size of your Outlook window and whether you're composing a new email message or a reply or forward, the Message menu and the Signature button might be in two different locations.

    Select Signature from the Message menu.

    Select Signature with a reply or forward in the reading pane.

  3. Under Select signature to edit, choose the signature you want to edit.

  4. Under Edit signature, edit your signature. You can change fonts, font colors, and sizes, as well as text alignment. 
    Type a new signature to use in your email 

  5. Choose OK to save your new signature and return to your message. Outlook doesn't add your new signature to the message you opened in Step 1, even if you chose to apply the signature to all new messages. You'll have to add the signature manually to this one message. All future messages will have the signature added automatically. To add the signature manually, select Signature from the Message menu and then pick the signature you just created.